In all but severe cases it is not medically necessary to have the width or length of a penis enlarged by surgery.

The penis can be made wider by injecting fat and tissue that has been removed from the thigh or abdomen using a procedure known as liposuction. The injections have to be repeated several times a year. Another method involves removing skin and tissue from the buttocks and adding it to the penis (dermal grafting).

Surgery to lengthen the penis involves cutting the ligaments from the pubic bone that support the penis, to make it hang out further. These are high-risk operations that often result in disappointment for the patient due to nerve damage, infection, and problems with the performance of the penis (due to lack of ligament support), impotence and unrealistic expectations.

Despite claims of amazing success, there is no evidence that it is possible to enlarge the penis by taking vitamin pills, wonder drugs, aphrodisiacs, regular stretching, or penis exercising.

It is also dangerous to put anything on or round the penis to maintain an erection. The quality of erections can however be improved by adopting a healthy lifestyle and treating any underlying physical or psychological problems associated with getting and maintaining an erection.